Preventive measures to reduce La Crosse encephalitis transmission by Aedes Triseriatus include which of the following?

• A. Using mesh screens and eliminating standing water
• B. Spraying broad-spectrum pesticides daily
• C. Wearing only thick gloves
• D. Avoiding outdoor activity entirely

Answer: (A)

Preventing La Crosse encephalitis from Aedes triseriatus hinges on two practical strategies: preventing mosquito bites and reducing the mosquito population at its source. Using mesh screens keeps mosquitoes from entering homes, so people aren’t bitten indoors or near entry points. Eliminating standing water removes the places where mosquitoes lay eggs and their larvae develop, which directly lowers the number of adult mosquitoes that could bite.

The other options don’t address both aspects effectively. Spraying broad-spectrum pesticides daily isn’t a sustainable or targeted solution and can lead to resistance and environmental harm. Wearing only thick gloves doesn’t prevent bites to exposed skin, so it doesn’t reduce transmission risk. Avoiding outdoor activity entirely isn’t realistic and doesn’t reflect how people live or work; prevention is best achieved through barriers and source reduction rather than avoidance.